Towards the performance limit of catenary meta-optics via field-driven optimization
通过场驱动优化达到悬链线超光学的性能极限
フィールド駆動最適化によるサスペンションワイヤ超光学の性能限界
필드 구동 최적화를 통해 현쇄선 초광학의 성능 한계에 도달하다
Alcanzar el límite de rendimiento de la superÓptica de la catenaria a través de la optimización impulsada por el campo
Atteignez les limites de performance de caténaire superoptics grâce à l'optimisation d'entraînement de champ
Достижение предела производительности висячей гипероптики с помощью оптимизации полевого привода
¹ National Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, China
中国 成都 中国科学院 光场调控科学技术全国重点实验室
² State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
中国 成都 中国科学院光电技术研究所 微细加工光学技术国家重点实验室
³ College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
中国 北京 中国科学院大学 材料科学与光电技术学院
⁴ Research Center on Vector Optical Fields, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
中国 成都 中国科学院光电技术研究所矢量光场研究中心
⁵ Department of Electrical and Computer Engineering, University of California Los Angeles (UCLA), Los Angeles, California 90095, USA
Catenary optics enables metasurfaces with higher efficiency and wider bandwidth, and is highly anticipated in the imaging system, super-resolution lithography, and broadband absorbers. However, the periodic boundary approximation without considering aperiodic electromagnetic crosstalk poses challenges for catenary optical devices to reach their performance limits.
Here, perfect control of both local geometric and propagation phases is realized through field-driven optimization, in which the field distribution is calculated under real boundary conditions. Different from other optimization methods requiring a mass of iterations, the proposed design method requires less than ten iterations to get the efficiency close to the optimal value. Based on the library of shape-optimized catenary structures, centimeter-scale devices can be designed in ten seconds, with the performance improved by ~15%.
Furthermore, this method has the ability to extend catenary-like continuous structures to arbitrary polarization, including both linear and elliptical polarizations, which is difficult to achieve with traditional design methods. It provides a way for the development of catenary optics and serves as a potent tool for constructing high-performance optical devices.
